Add zlib
[git/pclouds.git] / git-stash.sh
blob93a0829994780c151574a7888d769b5683fd2246
1 #!/bin/sh
2 # Copyright (c) 2007, Nanako Shiraishi
4 USAGE='[ | list | show | apply | clear]'
6 SUBDIRECTORY_OK=Yes
7 . git-sh-setup
8 require_work_tree
10 TMP="$GIT_DIR/.git-stash.$$"
11 trap 'rm -f "$TMP-*"' 0
13 ref_stash=refs/stash
15 no_changes () {
16 git diff-index --quiet --cached HEAD &&
17 git diff-files --quiet
20 clear_stash () {
21 logfile="$GIT_DIR/logs/$ref_stash" &&
22 mkdir -p "$(dirname "$logfile")" &&
23 : >"$logfile"
26 save_stash () {
27 stash_msg="$1"
29 if no_changes
30 then
31 echo >&2 'No local changes to save'
32 exit 0
34 test -f "$GIT_DIR/logs/$ref_stash" ||
35 clear_stash || die "Cannot initialize stash"
37 # state of the base commit
38 if b_commit=$(git rev-parse --verify HEAD)
39 then
40 head=$(git log --abbrev-commit --pretty=oneline -n 1 HEAD)
41 else
42 die "You do not have the initial commit yet"
45 if branch=$(git symbolic-ref -q HEAD)
46 then
47 branch=${branch#refs/heads/}
48 else
49 branch='(no branch)'
51 msg=$(printf '%s: %s' "$branch" "$head")
53 # state of the index
54 i_tree=$(git write-tree) &&
55 i_commit=$(printf 'index on %s' "$msg" |
56 git commit-tree $i_tree -p $b_commit) ||
57 die "Cannot save the current index state"
59 # state of the working tree
60 w_tree=$( (
61 rm -f "$TMP-index" &&
62 cp -p ${GIT_INDEX_FILE-"$GIT_DIR/index"} "$TMP-index" &&
63 GIT_INDEX_FILE="$TMP-index" &&
64 export GIT_INDEX_FILE &&
65 git read-tree -m $i_tree &&
66 git add -u &&
67 git write-tree &&
68 rm -f "$TMP-index"
69 ) ) ||
70 die "Cannot save the current worktree state"
72 # create the stash
73 if test -z "$stash_msg"
74 then
75 stash_msg=$(printf 'WIP on %s' "$msg")
76 else
77 stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
79 w_commit=$(printf '%s\n' "$stash_msg" |
80 git commit-tree $w_tree -p $b_commit -p $i_commit) ||
81 die "Cannot record working tree state"
83 git update-ref -m "$stash_msg" $ref_stash $w_commit ||
84 die "Cannot save the current status"
85 printf >&2 'Saved "%s"\n' "$stash_msg"
88 have_stash () {
89 git rev-parse --verify $ref_stash >/dev/null 2>&1
92 list_stash () {
93 have_stash || return 0
94 git log --pretty=oneline -g "$@" $ref_stash |
95 sed -n -e 's/^[.0-9a-f]* refs\///p'
98 show_stash () {
99 flags=$(git rev-parse --no-revs --flags "$@")
100 if test -z "$flags"
101 then
102 flags=--stat
104 s=$(git rev-parse --revs-only --no-flags --default $ref_stash "$@")
106 w_commit=$(git rev-parse --verify "$s") &&
107 b_commit=$(git rev-parse --verify "$s^") &&
108 git diff $flags $b_commit $w_commit
111 apply_stash () {
112 git diff-files --quiet ||
113 die 'Cannot restore on top of a dirty state'
115 unstash_index=
116 case "$1" in
117 --index)
118 unstash_index=t
119 shift
120 esac
122 # current index state
123 c_tree=$(git write-tree) ||
124 die 'Cannot apply a stash in the middle of a merge'
126 s=$(git rev-parse --revs-only --no-flags --default $ref_stash "$@") &&
127 w_tree=$(git rev-parse --verify "$s:") &&
128 b_tree=$(git rev-parse --verify "$s^:") ||
129 die "$*: no valid stashed state found"
131 test -z "$unstash_index" || {
132 git diff --binary $s^2^..$s^2 | git apply --cached
133 test $? -ne 0 &&
134 die 'Conflicts in index. Try without --index.'
135 unstashed_index_tree=$(git write-tree) ||
136 die 'Could not save index tree'
137 git reset
140 eval "
141 GITHEAD_$w_tree='Stashed changes' &&
142 GITHEAD_$c_tree='Updated upstream' &&
143 GITHEAD_$b_tree='Version stash was based on' &&
144 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
147 if git merge-recursive $b_tree -- $c_tree $w_tree
148 then
149 # No conflict
150 a="$TMP-added" &&
151 git diff --cached --name-only --diff-filter=A $c_tree >"$a" &&
152 git read-tree --reset $c_tree &&
153 git update-index --add --stdin <"$a" ||
154 die "Cannot unstage modified files"
155 git-status
156 rm -f "$a"
157 test -z "$unstash_index" || git read-tree $unstashed_index_tree
158 else
159 # Merge conflict; keep the exit status from merge-recursive
160 status=$?
161 test -z "$unstash_index" || echo 'Index was not unstashed.' >&2
162 exit $status
166 # Main command set
167 case "$1" in
168 list)
169 shift
170 if test $# = 0
171 then
172 set x -n 10
173 shift
175 list_stash "$@"
177 show)
178 shift
179 show_stash "$@"
181 apply)
182 shift
183 apply_stash "$@"
185 clear)
186 clear_stash
188 help | usage)
189 usage
192 if test $# -gt 0 && test "$1" = save
193 then
194 shift
196 save_stash "$*" && git-reset --hard
198 esac